1.B证据One of them said,“ I often forget if I should put something in or take something out of the fridge as soon as I open its door.”
2.B证据The second old man said,“I always wonder if I have just come upstairs or am going downstairs when I am standing on the landing.”
3.B证据I am even more forgetful than both of you
4.C综合全文
5.A总是忘当然很老了.